flutter_contacts/SwiftFlutterContactsPlugin.swift:435: Fatal error: Unexpectedly found nil while unwrapping an Optional value

[yanashenyang]

flutter --version
Flutter 3.38.1 • channel stable • https://github.com/flutter/flutter.git
Framework • revision b45fa18946 (12 days ago) • 2025-11-12 22:09:06 -0600
Engine • hash 78c3c9557e50ee7c676fa37562558c59efd8406a (revision b5990e5ccc) (12 days ago) • 2025-11-12 21:08:24.000Z
Tools • Dart 3.10.0 • DevTools 2.51.1

ios 13.0

build error
flutter_contacts/SwiftFlutterContactsPlugin.swift:435: Fatal error: Unexpectedly found nil while unwrapping an Optional value

[fefsouza10]

Facing the same error, on Flutter 3.38.3 after migrating to use the new UISceneDelegate

[hieutv-dng]

Facing the same error when upgrade Flutter 3.38.3

[nefus8]

I have the same problem when upgrade Flutter 3.38.3

[rjfernandes]

I have same error here

[AndLen23]

I am facing the same problem after upgrading to Flutter 3.38 and adapting app code to use UISceneDelegate.

Running my app in the XCode debugger revealed it crashing at startup at line 435 in file SwiftFlutterContactsPlugin.swift:

let rootViewController = UIApplication.shared.delegate!.window!!.rootViewController!

As a tip: You should get the rootViewController through the first active connected scene's keyWindow.

[sinnoorc]

I’m experiencing the same issue in iOS 26.1. My Flutter project is running on Channel Stable version 3.38.3